Pressure-roller.



PATENTED JULY- 14, 1903.

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PRES E APPLICATIO I ED NOYMODEL.

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UNITED STATES Patented July 14, 1903.

PATENT OFFICE.

FREDERICK I. DANA, OF PROVIDENCE, RIIODE ISLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE TEXTILE FINISHING MACHINERY COMPANY, A CORPORATION OF RHODE ISLAND.

PRESSURE-ROLLER.

STPEGIFICA'I'ION forming part of Letters Patent No. 733,630, dated July 14, 1903.

Application filed May 26, 1909. Serial No. 1 8,063. (No model.)

To aZZ whom it may concern:

Be it known that I, FREDERICK I. DANA, of the city and county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Pressure- Rollers and Methods of Making the Same; and I do hereby declare the following specification, taken in connection with the accompanying drawings, forming apart of the same, to be a full, clear, and exact description thereof.

The invention relates to pressure-rollers, and is more especially intended for use in connection with rollers used in cloth-printing machines and various cloth-finishing machinessuch as mangles, calenders, &c.to apply a heavy pressure to the material being treated. Such rolls have usually been provided with a copper surface supported on an iron core, and the most serious objection to this class of rollers has been the stretching and lifting of the copper away from the iron core when the surface of the roller was subjected to heavy pressure. The present invention is intended to overcome this objection and to provide a roller having a core and a surrounding sleeve of copper or other desired metal firmly united to the core, so that it will not be separated from the core or distorted by heavy pressure upon the surface of the roller. This roller embodies a core having grooves on its periphery and a surrounding sleeve of electrodeposited metal which is firmly united with the core not only by the adhesion of the deposited metal, but also by the interlocking parts of the core and the deposited metal. In producing such a roller for use in textile machinery an iron cylinder is first formed which is somewhat smaller in diameter than the finished roller, which iron cylinder is provided with trunnions for supporting the roller and forms the core upon which the copper facing is carried. One or more undercut grooves are then formed in the periphery of the iron core. These grooves may be formed in any desired manner to accomplish the desired result, but are preferably formed by cutting in the surface of the core a spiral groove in the nature of a screwelectrodeposition. being continued until the layer of copper is the desired thickness. The copper fills the grooves, and is thus firmly united with the core and is prevented from lifting away from or separating from the core by the overhanging side of the groove or grooves. I

In Figure 1 of the drawings is shown a roller embodying the invention in its preferred form, one-half of the core being shown in sec-- tion and one-half in elevation. Fig. 2 shows an elevation of a modified arrangement of grooves, and Fig. 3 is a sectional view of the roller shown in Fig. 2.

Referring to Fig. 1, the core of the roller is indicated at A, said core being provided with trunnions for supporting the roller. The core A is provided on its peripherywith an undercut groove a, extending spirally nearly the entire length of the core. This groove is substantially like a screw-thread and has one side 0 of the thread undercut, so that the top (Z of the thread overhangs the bottom 6. The electrodeposited copper B fills the groove to and is prevented from moving outward away from the core by the overhanging sides 0 of the groove a. The copper sleeve is also prevented by the interlocking parts of the core and sleeve from moving either longitudinally or circumferentially on the core, and thus the copper sleeve is firmly and securely united and anchored to the core, so that it will not stretch and become detached from the core when subjected to heavy pressure.

In Fig. 2 the core A is provided with a series of undercut grooves a, which extend spirally from one end of the roll to the other. The electrodeposited copper B fills these grooves and this firmly unites or anchors the copper sleeve to the core. To hasten the depositing of the copper about the core, the grooves may be filled or partially filled with copper prior to the electrodeposition of the copper. In this case the electrodeposited I groove iii its periphery in the form of a screwcopper will unite with the copper placed in the thread, and having one side of the thread ungrooves and become integral therewith. dercut so that the top of the thread overhangs hat I claim as my invention, and desire the bottom thereof, and a surrounding sleeve 5 to secure by Letters Patent, is of electrode-posited metal.

1. A roll consistin of a core haviil a spiral r groove in its periphery in the form of a screw- FREDERK/k DANA thread, and a surrounding sleeve of electro- Vitnesses:

deposited metal. W. H. THURSTON, IO 2. Aroll consisting of a core having a spiral J. H. THURSTON. 

